About accordion's header's background

About accordion's header's background

hello,
      I have a list of data using accordion, each data in the list contains header and detail.

I looked at "ui.accordion.css" and found that I have to do something in this line :

.ui-accordion .ui-accordion-header { cursor: pointer; position: relative; margin-top: 1px; zoom: 1;    }

I tried to add "background: #cccccc  url(images/ui-bg_highlight-soft_75_cccccc_1x100.png) 50%  50%  repeat-x" in the css code above and it work. The headers' background are changed.

But how can I change some of the header's background not all?

this is my html code:
        
<script type="text/javascript">
          var $j = jQuery.noConflict();
       
        $j(function() {   
       
   
            $j("#accordion").accordion({
                collapsible: true
            });
        });
        </script>
<body>

<div id="accordion">
        <h3> list 1 </h3>
        <p>
            this is list 1
        </p>
        <h3> list 2 </h3>
        <p>
            this is list 2
        </p>
        <h3> list 3 </h3>
        <p>
            this is list 3
        </p>
        <h3> list 4 </h3>
        <p>
            this is list 4
        </p>
</div>






























How can I change background only <h3>list 2 </h3>, for example, to plain orange color while other are still using url(images/ui-bg_highlight-soft_75_cccccc_1x100.png)


Sorry I'm not good at English gramma